PHOTOS: The British Are Fighting And Getting Arrested Over Black Friday Sales

Black Friday is causing havoc.
Carlo Allegri/Reuters
Black Friday has landed in the UK and the sales event is creating mayhem.

On Friday morning, as retail outlets opened their doors at 8am, the police had already been called to more than 10 supermarkets across the country.

Asda is one retailer experiencing hectic shop floors. A spokeswoman told Business Insider that it sold more than 10,000 tablets in the first two hours of trading and as of 1pm had more than two million customers.

At an ASDA in Wembley, London, images even surfaced of a shopper who had been "knocked to the ground".

"We do not condone the behaviour of a very small number of people in our Wembley store this morning. Despite our extensive planning and additional security colleagues there was an isolated incident this morning when the store opened. The sale has run smoothly in all our other 440 participating stores," ASDA told Business Insider.

A spokesperson told Business Insider: "In the interest of customer safety a small number of these stores contacted police last night to help control crowds safely and stores are now trading normally. We always take guidance from police authorities on security measures in stores and we'll work closely with them to make any improvements for next year."

In Manchester, officers had to make two arrests as shoppers competed to bag the best bargains.

Here's a group of police officers try to restore order as shoppers panic:

People can be seen flooding into shops, arguing over TV purchases, and pushing past queues to grab discounts:

Some people are prepared to wait for hours and fight each other to get their hands on cheap offers:

The likes of Good Morning Britain, Rupert Neate, and Kadhim Shubber have been posting Vines. Some videos are quite shocking:

The BBC's Zoe Conway tweeted this photo from the melee at ASDA in Wembley:

This Vine by Ben Phillips sums the situation up well:

A video on YouTube, posted by DeanCoombesAnfield, even captures two women fighting over underwear:

The queues for Black Friday deals started in the early hours of Friday morning. Although it was first introduced by Amazon and ASDA in 2010, this year it's proving more popular and has been taken on by more companies.